Parsing custom strings

[Dogway]

I would like to construct strings based on parameter inputs.

I want to make a function that adds null frames. So something like this:

FillGap(source, blank, "118,4;503,2,1100,2")

This would translate in the function like

prune(source,blank,scmd="0(0,118);1(119,122);0(123,502);1(503,505);0(506,1099);1(1100,1102)")

I'm not sure whether this is possible in avisynth scripting. I use this heavily to sync audio from one video to another. Later on I would add an option for minus integers so I can trim out video.

[ndjamena]

http://avisynth.nl/index.php/Internal_functions#String_functions

Of course it's possible, and if the internal string functions aren't enough for you, you can write your own plugin using c++.

Is what you're really asking is if anyone wants to write a function to do it for you?

[Dogway]

http://avisynth.nl/index.php/Internal_functions#String_functions

Of course it's possible

How? In avisynth language.

[ndjamena]

Astring = "118,4;503,2,1100,2"

cpos = FindStr(Astring,",")

will give you the position of the first comma.

snum = LeftStr(Astring, cpos)

will give you the first number

dstring = RightString(Astring, cpos + 1)

will remove the number from the string.

Then you just need to write a recursive function that calls itself...

[Dogway]

What's RightString()? you mean RightStr()? it does nothing more than return the last 4 digits "00,2"(because the first found "," is in 4th position as cpos).
I guess one could do a mix of StrLen and cpos, to get the remaining string.

This is the easy part, the recursive function is the core of the issue, I guess I need to rely on things like Gscript or such?

[ndjamena]

Yup, sorry, don't care so I'm not paying attention.

function Recurse( string s )
{
return s.Recurse
}

That will circle forever, generally you add a check to see if it needs to continue, if it doesn't you just don't call the function in the current return statement.

-edit-
and before you ask:

http://avisynth.nl/index.php/Operators

return dstring == "" ? newstring : newstring.Recurse

[Dogway]

I just got the building block, here I can get both values; I only need the recursive function:

function FillStr(string Astring){
cpos = FindStr(Astring,";")
str = LeftStr(Astring, cpos-1)
sstr=FindStr(str,",")

L1 = LeftStr(str,sstr-1)
R1 = MidStr(str,sstr+1)

# prune(a,b,scmd="0(0,15308);")

#2nd pass
Astring1=MidStr(Astring,cpos+1)

return Astring1 == "" ? Astring1 : FillStr(Astring1)}

Another untackled bit is how you are supposed to do the operations. I need to operate with the numbers to build the prune call. I was searching but I don't see any string to value function. Are you sure this is doable in avisynth?

[ndjamena]

Value(string)

Its' in the conversion functions:

http://avisynth.nl/index.php/Internal_functions#Conversion_functions

And you can concatenate strings using an addition '+' operator:

http://avisynth.nl/index.php/Operators